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/*
Unix SMB/CIFS implementation.
charset defines
Copyright (C) Andrew Tridgell 2001
Copyright (C) Jelmer Vernooij 2002
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* this defines the charset types used in samba */
typedef enum {CH_UCS2=0, CH_UNIX=1, CH_DISPLAY=2, CH_DOS=3, CH_UTF8=4} charset_t;
#define NUM_CHARSETS 5
/*
* for each charset we have a function that pushes from that charset to a ucs2
* buffer, and a function that pulls from ucs2 buffer to that charset.
* */
struct charset_functions {
const char *name;
size_t (*pull)(void *, const char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft);
size_t (*push)(void *, const char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft);
struct charset_functions *prev, *next;
};
/*
* This is auxiliary struct used by source/script/gen-8-bit-gap.sh script
* during generation of an encoding table for charset module
* */
struct charset_gap_table {
uint16 start;
uint16 end;
int32 idx;
};
/*
* Define stub for charset module which implements 8-bit encoding with gaps.
* Encoding tables for such module should be produced from glibc's CHARMAPs
* using script source/script/gen-8bit-gap.sh
* CHARSETNAME is CAPITALIZED charset name
*
* */
#define SMB_GENERATE_CHARSET_MODULE_8_BIT_GAP(CHARSETNAME) \
static size_t CHARSETNAME ## _push(void *cd, const char **inbuf, size_t *inbytesleft, \
char **outbuf, size_t *outbytesleft) \
{ \
while (*inbytesleft >= 2 && *outbytesleft >= 1) { \
int i; \
int done = 0; \
\
uint16 ch = SVAL(*inbuf,0); \
\
for (i=0; from_idx[i].start != 0xffff; i++) { \
if ((from_idx[i].start <= ch) && (from_idx[i].end >= ch)) { \
((unsigned char*)(*outbuf))[0] = from_ucs2[from_idx[i].idx+ch]; \
(*inbytesleft) -= 2; \
(*outbytesleft) -= 1; \
(*inbuf) += 2; \
(*outbuf) += 1; \
done = 1; \
break; \
} \
} \
if (!done) { \
errno = EINVAL; \
return -1; \
} \
\
} \
\
if (*inbytesleft == 1) { \
errno = EINVAL; \
return -1; \
} \
\
if (*inbytesleft > 1) { \
errno = E2BIG; \
return -1; \
} \
\
return 0; \
} \
\
static size_t CHARSETNAME ## _pull(void *cd, const char **inbuf, size_t *inbytesleft, \
char **outbuf, size_t *outbytesleft) \
{ \
while (*inbytesleft >= 1 && *outbytesleft >= 2) { \
*(uint16*)(*outbuf) = to_ucs2[((unsigned char*)(*inbuf))[0]]; \
(*inbytesleft) -= 1; \
(*outbytesleft) -= 2; \
(*inbuf) += 1; \
(*outbuf) += 2; \
} \
\
if (*inbytesleft > 0) { \
errno = E2BIG; \
return -1; \
} \
\
return 0; \
} \
\
struct charset_functions CHARSETNAME ## _functions = \
{#CHARSETNAME, CHARSETNAME ## _pull, CHARSETNAME ## _push}; \
\
NTSTATUS charset_ ## CHARSETNAME ## _init(void) \
{ \
return smb_register_charset(& CHARSETNAME ## _functions); \
} \
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